Nortel Networks 2300 manual Configuring and Managing IP Routes, Clearing the System IP Address

Configuring and Managing IP Interfaces and Services 117

Clearing the System IP Address

Caution! Clearing the system IP address disrupts the features that use the address.

To clear the system IP address, use the following command:

clear system ip-address

Configuring and Managing IP Routes

The IP route table contains routes that WSS Software uses for determining the interfaces for an WSS switch’s external communications. When you add an IP interface to a VLAN that is up, WSS Software automatically adds corresponding entries to the IP route table.

For destination routes that are not directly attached, you can add static routes. A static route specifies the desti- nation and the gateway router through which to forward traffic.You can add the following types of static routes:

•Explicit route—Forwarding path for traffic to a specific destination

•Default route—Forwarding path for traffic to a destination without an explicit route in the route table

A destination can be a subnet or network. If two static routes specify a destination, the more specific route is always chosen (longest prefix match). For example, if you have a static route with a destination of 10.10.1.0/ 24, and another static route with a destination of 10.10.0.0/16, the first static route is chosen to reach 10.10.1.15, because it has the longer prefix match.

If the IP route table contains an explicit route for a given destination, WSS Software uses the route. Otherwise, WSS Software uses a default route. For example, if the route table does not have a route to host 192.168.1.10, the WSS switch uses the default route to forward a packet addressed to that host. Nortel recommends that you configure at least one default route.

You can configure a maximum of four routes per destination. This includes default routes, which have destina- tion 0.0.0.0/0. Each route to a given destination must have a unique gateway address. When the route table contains multiple default routes or multiple explicit routes to the same destination, WSS Software uses the route with the lowest metric (cost for using the route). If two or more routes to the same destination have the lowest cost, WSS Software selects the first route in the route table.

WSS Software can use a route only if the route is resolved by a direct route on one of the WSS switch’s VLANs.

Nortel WLAN Security Switch 2300 Series Configuration Guide